package com.demo.utils;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author : YU.TAN
 * @date : 2021/10/26 17:29
 */
public class MD5Util {
    public static String stringToMD5(String plainText) {
        byte[] secretBytes = null;
        try {
            secretBytes = MessageDigest.getInstance("md5").digest(
                    plainText.getBytes());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("没有这个md5算法！");
        }
        String md5code = new BigInteger(1, secretBytes).toString(16);
        for (int i = 0; i < 32 - md5code.length(); i++) {
            md5code = "0" + md5code;
        }
        return md5code;
    }

    public static void main(String[] args) {
        String s="F4AA729C6F820C6742C9C57FC435B967appKey=smart_marketingparam={\"orderId\":\"861352066\"}timestamp=1634353847F4AA729C6F820C6742C9C57FC435B967";
        String s1 = stringToMD5(s);
        System.out.println(s1);

    }
}
